all water systems have what they call an efficiency rating. so if you were to measure the water that goes into your system and compare it to the water that goes out, how much is unaccounted for? most states have a goal of 10%. ours is at only 5.5% right now. and we have plans to lower that to 4%. man: we actually have our entire distribution system mapped out in a computerized or electronic format. and we can locate our pipes, we can locate our valves, we can locate water meters that are out there. we've got small units installed in the distribution system. and they actually listen for leaks. we can schedule the repair, minimize its impacts to the surrounding community, and it minimizes cost, because obviously, if you've got a leak that's been leaking for sometime, you're going to see a lot of undermining of the roadways, potential property damage. fisher: all the sensors in the field come into this location. these two operators behind me operate the entire water system, 24/7. so we can see all of our reservoirs, their elevations, whether they